Pinealon

Peptide bioregulators are built on a specific claim: that very short peptides extracted from — or synthesised to match — a particular organ can travel to that same organ and restore its normal function as it ages. Pinealon is the neuronal version, promoted for memory and mental performance. It has attracted somewhat more experimental attention than most of the class, including work on protecting neurons from oxygen deprivation. The proposed route is direct interaction with DNA to switch tissue-specific genes back on. That mechanism has been demonstrated to the satisfaction of the group that proposed it and essentially nobody else.

A tripeptide reported to reduce neuronal apoptosis under hypoxic and oxidative stress in cell culture and rodent models, with claimed effects on caspase-3 activity and antioxidant enzyme expression. It appears more frequently in the international literature than most peptides in this class, though still almost exclusively from the originating group and its collaborators. The class hypothesis holds that di-, tri- and tetrapeptides penetrate cell and nuclear membranes and bind directly to specific promoter sequences in double-stranded DNA, modulating tissue-specific transcription — a mechanism supported by molecular modelling and gel-shift work from the originating institute but not independently corroborated. Products are marketed in two chemically distinct forms: "Cytomax" preparations, which are peptide fractions extracted from the corresponding animal organ, and "Cytogen" preparations, which are defined synthetic short peptides. Published clinical evaluation is limited to small Russian studies, generally without blinding, placebo control or independent statistical review.